System of distribution.



'B. I'RANKENFIELD. SYSTEM OF DISTRIBUTION. I APPLICATION FILED 001214, 1906.

921 ,39%, Patented May 11, 1909.

2mm 300: V I gmm/o/vfim/z IN I W K We/ @QMM fiilbtat pf IYisconsin, have invented certain.

.55 the balancer arecon-.

,2 age t tr g boost .30 tiiw pre i f er-im e it STATES PATENT QF E I BUnn'a RAN KENrIELn, or MILWAUKEE, Wiscons n, Assfe Yon ro ALms-cHALMEns are; 921,392.

alt h m at .maaw 'Beit'l'r itizen f the United States, residing at lilwaukegin tl i,e .county of Milwaukee and v ,a,a i se fu'l,Improvements in Systems of Distribution, of which the following is a full clear, and exact specification.

" in 'ention relates to systems of distrihi 10 id is a noclification of the invention I nany 91101 patent X0. 850,217, era d Apr l 1. .,-l907. In the arrange- ,in- Eigures 2, 3, and 4 ofsaid v abalancer set is connected to e, wire system, and a booster generator hanically;connected to the balancer has itsarmature electrically conn. the. neutral wire between the load halan'cer set. Vith that arrange- ,er armature carries the whole neutra eminent, the sum of the currents in meet and 1. 11

n th halancer commutators. Its commutator istheretore necessarily quite large.

lnm y present,invention it is the object @tito'pro id e asystem in which the booster e notdiave to carry as great a 1 1, n tasn' u'chlprior patent, and to obta n SQY alpt her advantages over said prior patent. gel 0. er armature, according to in ,-ent; on. carries substantially oi the neutrat wire current instead ot t.1ieole,, f it and the capacity ot'the a r e ii all) about half as great as iii the balancer systems of my aforesaid j l features of my intenom the description and 'l appear,

be particularly pointed OOMPnNY, A QORPORATION OF NEh-"JERsEY. 1.

Application filed October 14, 1908. Serial No. 457,625.

ownthat I, Bonn FRASKENFIELD,

' in the neutral wire and in the'coil 201 "ysteni of distribution.

SYSTEM OF DISTRIBUTION Specification of iiettersjlatent,

: leatente'dmay 1 1;, 1909.

nected between the neutral wire and'the two outside mains respectively. In series with one of these commutators, here 17, is the armature 19 of the booster, which booster is mechani ally connected to the balancer set as by being mounted on the same shaft therewith;

In Fig. 1, the booster field is excited by a coil 20 connected in the neutral wire between the load and-the balancer. \Vhen the current, is the same in the two sides of the system, and conseqiiently there is no current in the neutral wire,-the coil 20 conducts no current and the armature -19 .gene 'ates no electro-motive force, The balancer 15 then runs as a double armature motor, absorbing only energy enough to supply its no load losses.

hen the currents taken by the two'sides of the system are. unequal, there is cur-rep; the current in the lower side of the system, or between "the wires 12 and 14, is the heavier, the balancer winding-connected to the commutator 1S acts as generator and that connected to the commutator '17 as motor, and the armature 19 increases or boosts the electro-mot-ive force impressed on the winding connected to the commutator ,17, the winding 20 beingpitoperlyconnected to obtain this last result. By thus increasing the electro-motire force impressed on the motor armaturewinding' of the balancer, the

erator balancer winding is increased to obtain the desired compounding effect and to :maintain the voltages of the two sides of the system at their proper values. This efiect is substantially in direct proportion to the neutral current. y

When the current in the upper side of the system, or between the wires 11 and H, is the heavier, the functions ofthe two armature windings of the balancers are interchanged, the windings connected to the commutators l7 and lS'acting as generator and motor respectively. The booster armature 19 is now in the secondary circuit of the balancer, and the current in it is opposite towhat itwas in the previous case; But the current. in the coil 20 is also-the reverse ofwhat it was previously, so that, as before, the elecfiro-m'otiveforce generated in' the armature .19" tends to assist the flow ot current ihl0llgli-it'.- This increases the electromotive force impressed by the balancer on the circuit 11 and 14 and so'produces the desired compounding effect. As before, this effect is substantiallyin direct proportion to the current'in the neutral wire.

The booster armature 19 is thus sometimes nncing of the current in the neutral wire.

But thecommut-ator of the booster carries only the current of one of the balancer armature windings, or substantially one-half of the neutral current, instead of, as in my aforesaid prior patent, the sum of the currents in the two balancer armature windings, ,or; the total neutral current. ,Therefore the booster commutator, need not be as large as in the arrangement shown in my prior patent.

The arrangementshown in Fig. 2 differs from that shown in Fig. 1 only in that the booster field coil is difi'erently connected. In Fig. 2 the booster field coil 21 is connected in series with the booster armature. As the currents in the two sides of the system become unbalanced, the balancer armature windings'will operate as motorand generatorrespectively as required, and the booster 19 willsupplythe electro-motive force to assist the flow of current throughthe balancer winding connected to the commutator 17 whether such wlndlngbe acting as motor or generator. But in Fig. 2 the electro-motive force of the booster is in'proport-ion to the current in. the balancer winding con nected. to the commutator 17, instead of being .in-proportion to the current in the neutral wire as in. Fig. 1. These results would be nearly the same in practice.

- Other modifications may be made in the precise arrangements here shown and described, and all such which do notinvolve a departure from the spirit and scope of my invention, I aim to cover in, the following claims.

What I claim as new is: 1. In combination, adynamo-electric machine" unit having two armature windings each arranged to. act as motor or generator as conditions require, and-a booster armature {connected continuously in series with one of said armature. windingsand arranged to assist the flow of current in the armature winding with which it is in series, whether such .;winding is acting. asv motor or generator.

,2. Ina three wire system of distribution, the combination of the three conductors of the system, a balancer comprising an armature-winding connected between the neutral conductor, and each of the main conductors,

ing eifect to the balancer and to carry substantially half of the current in the neutral conductor.

3. In a multiple wire system "of distribution, the combination of the two main conductors, a neutral conductor, a balancer set having an armature winding connected between the neutral conductor and each of the main conductors, a booster armature connected in series with one of the armature windings of the balancer set and between such winding and one of the conductors to which it is connected, and means forcausing said booster armature to generate an electromotive force to assist the flow of current in the balancer armature. winding with which it is in series.

4. In a multiple wire system of distribution, the combination of the two main conductors, a neutral conductor, a balancer set having an armature winding connected between the neutral conductor and each of the main conductors, a booster armature connected in series with one of the armature windings of the balancer set and between such winding and one of the conductors be-. tween which it is connected, and means for causing'said booster armature to generate an electro-motive force which assists the flow of current in the balancer armature winding with which it is in series and which is substantially .in proportion to the unbalancing of the system.

5. In a multiple wire system of distribution, main conductors, a neutral conductor, a balancer sethaving armature windings connected respectively between said neutral conductor and the main conductors of the system, and a booster armature connected in series with one only of the armature windings of the balancer when the system is unbalanced and arranged to generate an electro-motive force substantially in proportion tion, two main conductors, a neutral con-' ductor, a balancer having two armature windings connected respectively bet-ween said neutral conductor and said two main conductors, and a booster connected in series with one only of said balancer 'armature windings when the system is unbalanced and and a. boosterarranged to give'a compound- {arranged to generate an electro-motive force which assists the flow of current through said Winding whether the latter is acting as'inotor or generator and is substantially in proportion to the difference in the currents on the two sides of the neutral wire.

8. In comhinetien, adyneino electric chine unit having two armature windings end arranged; to transmit energy in either direction an armature winding connected in series with one only of the aforesaid'armature windings when said unit is transmitting energy in either direction and arranged to rotate in e field which reverses according to the functions of the windings of the dynamo-electric Ina-chine unit.

9. In a multiple voltage system of distrilmtion, the combination of main and comto said conductors, nd a booster armature connected in series with less than all of the armature windings of the balancer when the system. is unbalanced and arranged to generate an-electro-motlve force which assists the flow of current in the balancer armature winding 01' windings with which it is in series whether the latter be acting as motor or generator,

. In testimonywhereof Iafiix my signature, in the vpresence of two witnesses.

BUDD FRANKENFIELD. Witnesses s H. C. CAsE,

CHAS. L. BYRON 

